erro calling db.uuid method

[manuelep]

https://github.com/web2py/pydal/blame/v20220609.1/pydal/base.py#L298

db.uuid method is called (as it's normal for a class method) with self as first argument but it correspond to a function that accepts no parameter, so it always raises an exception

at least line 298 in base.py should be substituted with:

uuid = lambda self:  uuidstr()

[mdipierro]

fixed